Sewing machine



'4 Sheets-Sheet l Jan. 30, 1934. A. B. cLAYToN SEWING MACHINE Filed Nov. l, 1952 4 Sheets-Sheet 2 A. B. CLAYTON Jan. 3o, 193.4.

SEWING MACHINE Filed NOV. 1, 1932 :ndrew B. Clacy/o Jan. 3o, 1934. A, B, CLAYTON 1,945,478

SEWING MACHINE Filed Now/.A1, 1952 #shafts-sham;v 44

44 u E *M1 J6 gmc/Wto@ @7n/drew 3. Ulacl] l/ Patentedv Jan. 30, 1934 SEWING MACHINE v Andrew B. Clayton, Union, N. J., assignor to The Singer Manufacturing Company, Elizabeth,

N. J., a corporation of New Jersey Application November 1,1932. Serial No. 640,586

9 Claims.

This invention relates to sewing machines, more particularly of the i'eed-off-arm type, and has for an object to provide a machine of this type having a simpliiied form of frame and work-supporting arm with a simple and efilcient chainstitch looper mechanism and an accompanying looper-thread controlling mechanism constructed for, arranged in and combined with said worksupporting arm tov form a chine. 4 v

With the above and other objects in view, as will hereinafter appear, the invention comprises the devices, combinations, and arrangements of parts hereinafter set forth and illustrated in the accompanying drawings of a preferred embodiment of the invention, fromwhich the several features,

i' of the invention and theladvantagesfattained thereby will be readily understood by those skilled in the art. 1

In the accompanying drawings, Fig. 1 is a front elevation, partly in section, of a feed-off -arm sewing machine embodying the invention. Fig. 2 is a top plan view of the machine with thehead of the free end of the gooseneck broken away toshow the parts in the underlying free end of theA work-supporting arm. Fig. Sis an end elevation of the machine looking from the left in Figs. 1 and 2, with the work-supporting arm in longitudinal vertical section. Fig. 4 is a section on the line 4 4,- Fig. 2. Fig. 5 is a section ion the line 5 5, Fig. 2. Fig. 6 is asection on the line 6 6, Fig. 2. Fig. 7 is a section on the line 7 7, Fig. 2. Fig. 8 is a section on the line 8 8, Fig. 2 to show the feed-bar actuating mechanism, and Fig. 9 is .a front elevation of the lower forwardly disposed arm which is shown in section in Fig. 1.

The machine frame includes the usual gooseneckfl which terminates at its freeend in the head 2 carrying the reciprocatory needle-bar 3 and presser-bar 4 iii-ted, respectively, with the needles 5 and presser-foot 6. The needle-bar 3 is reciprocated by means of the usual link-connection 7 with the crank 8 on the rotary shaft 9 which is journaled in the horizontal member of the gooseneck l and is fitted with the usual balance wheel 10- and pulley 11 for belt-connection- The needle-bar 3 carwith the source of power. ries the needle-thread take-up arm 12 commonly used in chain-stitch sewing machines. Except for the chain-stitch type of take-up arm 12, the present gooseneck and its mechanism are preferably constructed substantially in accordance with the disclosure of the application of Walter Myers, Serial No. 627,409; filed Aug. 4, 1932. The invenl simple and efficient high speed chain-stitch feed-oif-arm sewing ma-k.

tion is not to be understood, however, as limited in any way to the speciflc'construction of the gooseneck and/ or the mechanism carried thereby. The gooseneck is rigidly associated .with and preferably mounted on a preferably4 U-shaped 60 bed including an arm 13 extending forwardly from the goosene'ck, alaterally extending hollowhorizontal arm14 joined at one end to the forwardly extending arm 13, and a rearwardly extending hollow horizontal work-supporting arm l5 joined 65 at one end to and coplanar with the laterally extending arm 14 and terminating at,V its free end lbelow the head 2 at the free end of the gooseneck. The arms 14 and 15 are joined in the form of an L laid horizontally. There is journaledA in the forwardly disposed laterally extending arm 14 a lower rotary shaft 16 which isconnected to rotate-in timed relation with the shaft 9 preferably by the conventional clip-belt 17 housed within the belt-casing 18 ex- 75 teriorly of the sewing machine frame proper..l

The machine may be provided with feeding mechanism including a feed-bar 19 disposed centrally within and lengthwise of the work-supporting arm 15. The feed-bar 19 is mounted to 80 rock with and slide upon the fulcrum-block 20 mounted on the eccentric fulcrum-pin 2l sustained by and rotatably adjustable in the spaced feed-fulcrum-posts 22. Thefeed-bar "19 carries the feed-dog 23. The feed-bar is provided at its forward end, i. 'e.,\its end remote from the feeddog 2 3, with a horizontal feed-lift fork 24 and a vertical ,feed-,advance fork, 25, Fig. 8.` These forks embrace, respectively, the feed-lift eccen-` tric 26 and feed-advance eccentric 27 on the 90 shaft 16.

Journaled in bearing lugs 28, 29, within the v work-supporting arm 15 is the rocking and sliding looper-shaft 30 carrying the threaded loopers` 3l which cooperate with the needles 5 to form 95 the usualtwo-thread or double-chain stitches. The looper-shaft 30 is given its rocking movement, to move the loopers endwise into and out ofthe needle-loops, by means of the eccentric 32, Fig. 4, on the lower rotary Ashaft 16. The eccentric 32 is .embraced by the follower 33 which slidably engages the pin-extension 34 of a rocklever 35 fulcrumed at 36 within the work-supporting arm l5 and connected by the link 37 to the crank-arm 38 fixed upon the looper-shaft 30. 105

The looper-shaft is given its endwise sliding movements, to give to the looper blades their usual sidewise components of motion, by means of the eccentric 39 fixed on the shaft 16. The eccentric 3911s embraced by the split block 40 110 i working. in the vertical fork 41 at the forward end of a slide-rod 42 journaled in the bearing 43.

tively, by the eccentrics 33 and 39 and extend substantially horizontally from the latter into and lengthwise of the work-supporting arm.

The feed-bar 19 with its actuating eccentrics 26, 27 are preferably arranged substantially centrally of the work-supporting arm, to minimize torsional strains on the feed-bar.

opposite sides of the feed eccentrics 26, 27, to facilitate their connection with the looper-shaft 30 by means ofthe intermediate connection ele- 'ments 35, 42 previously described. y

The laterally extending arm 14 is formed pref-verably at :its juncture with the forwardly ex- I tending arm '13.with'an opening 46l within.- which and upon the shaft 16 is preferably mounted the looper-thread-controlling cam '47. This. `'caml may be of usual form to cooperatein the usual manner with the stripper blade 48 and the threadguides 49. 'An' intermittent `threadnipper 50 may also be arranged alongside the thread-controller cam 47, Fig. 2, to function as usualto nip,

the looper-thread at'the time when the cam 4'7 is pulling slack looperthread back from the' loopers during the retracting stroke'of the latter` following seizure of the needle-loops. The nipper is opened asthe loopers advance, sothat the looper-thread may run 'freely from the ,supply and'` the usual flooper-thread-tension device 51 whichmay conveniently be mounted on thelbeltcasing 18. ,Y From *thev threadfcontroller '47, theA looperthreads mayrunin the groove 52 cut externally along `thelaterally extending arm ,14 to the thread-tube 53 through which the looper .threads may run to the stationary guide 54 adjacent the heelsfof the loopers.y The thread-controller opening `46 inthe'arm 14 may normally be closed by the hinged cover.55 which may be swung upwardly about its hinge thread-controller. l

Having thus set forth the .nature of the invention, what I claim hereiniszv l having, in combination, 'a frame including a gooseneck, a'forwardly extending arm rigid with said gooseneck, a laterally extending horizontall arm joined at one end to said forwardly extend-' ing arm, a rearwardly extending horizontal work- `supporting armjoined atone end toand sub-- stantially coplanar with said laterally extending arm and terminating at its free end below the free end of said gooseneck, an upper rotary shaft journaled horizontally in said gooseneck, a lower arm, means connecting said shafts to rotate in timed relation to one another, a reciprocatory needle'mounted at the free end of said goose-l neck and connected to be driven by. said upper rotary shaft, and an oscillatory chain-stitch looper disposed within the free end of said worksupporting arm in cooperative relation with said 'Ivhe looper actuating eccentrics are preferably arranged at pin 56 to expose the needle and connected tolbfe ylririenbyjsaidglryer rotary shaft.

, 2. Achain-stitch feed-off-arm sewing machiney .supporting arm joined at one end to and substantially coplanary with said laterally extending arm and terminating at its free end below the free 'end of` said gooseneck, an upper rotary shaft journaled horizontally in said gooseneck, a lower rotary shaft journaled in said laterally extending arm, means connecting said shafts to rotate in timed relation to one another, a reciprocatoryl .needle mounted vat the free end of said gooseneck and connected to be driven by said upper rotary shaft, ra four-motion chain-stitch looper mounted within the free Aend of said work-supporting arm in cooperative relation with said needle, and

means connected to said lower rotary shaft and vextending substantially horizontally from said laterally extending larm into said work-,supporting.: arm foractuating said looper. 1

3.' A chain-stitch feed--off-,arm sewing machine. having,` in f combination, av framev including a porting arm j oned at one end to and' substantially coplanar with said laterally extending arm and terminating at its free enclbelow the free yend of said gooseneck,'an upper rotary shaft journaled horizontally in said gooseneck, a lower rotary shaft journaled in said laterally extending arm, means connecting said shaftsfto rotate: intimed relation to one another, a reciprocatory'needle mounted at the free end of-said gooseneck and connected tolbe driven by said upper rotary shaft, a four-motion chain-stitch looper mounted within thefreeend of said Work-supporting arm in cooperative relation with saidneedle, means connected lto said lower rotary shaft and extending substantially horizontally from said laterally extendingarm intoy saidwork-supporting arm for impartingy endwise .loop-seizing andi .-shedding vmovements to said looper, and vother means connected to said lower rotary'shaft'and extending substantially horizontally-from said laterally extending arm into said work-supporting arm for imparting sidewisemovements to said looper.

4. Achain-stitch feed-off-arm sewing machine having, in combination, a frame including a goosef neck, a forwardly'extending arm rigid with' said 1. A chain-'stitch feed-of-arm sewing machine gooseneck, a laterally extending horizontal arm `Vjoined at one end to said forwardly `extending tially'coplanar with said laterally extending arm and terminating at its free end belowv the free end roo of said gooseneck, an upper rotaryshaft jour- Y naled horizontally in said gooseneck, ,a lower rotary shaft journaled in said laterally extending arm, means connecting said shaftsto rotate in timed relation'to one another, a reciprocatory rotary shaft journaled in said laterally extendingv needle mountedfat the free end of saidgooseneck and connected to be driven by said upper rotary shaft, a rocking and sliding looper shaft jourfor imparting endwise sliding movements to said looper-shaft, a second eccentric on said lower rotary shaft, a vibratory lever actuated by said eccentric and fulcrumed within said work-supporting arm so as to extend lengthwise of the latter, and an operative connection between said vibratory lever and said looper-shaft for imparting rocking movements to the latter.

5. A chain-stitch feed-oiT-arm sewing machine having, in combination, a frame including a gooseneck, a forwardly extending arm rigid with said gooseneck, a second arm extending laterally from the forward end of said first mentioned arm, a work-supporting arm extending rearwardly from and substantially coplanar with said laterally extending arm, a reciprocatory needle operatively mounted in said gooseneck, a rotary shaft journaled in said laterally extending arm, a feed-bar disposed within and lengthwise ofsaid work-supporting arm, a looper-shaft journaled within and lengthwise of said work-suportlng arm below said feed-bar, feed-actuating means on said rotary shaft connected to operate said feed-bar, a pair of looper-actuating ecccntrics on said rotary shaft at opposite sides of said feed-actuating means, a slide-shaft connected to one of said eccentrics and to said looper-shaft for moving the latter endwse, a rock-lever connected to the other of said eccentrics and to said looper-shaft for rocking the latter, said slide-shaft and rock-lever being mounted within and lengthwise of said worksupporting arm and at opposite sides of said feeding bar.

6. The combination with a hollow horizontal work-supporting arm and a hollow horizontal forwardly disposed arm substantially coplanar with and carrying said work-supporting arm, said arm-s taken together having the form of an L, of a rotary driving shaft journaled in said forwardly disposed arm, a rocking and slidlng looper-shaft journaled in said work-supporting arm, a pair of eccentrics on said rotary shaft, a pair of intermediate looper-shaft actuating elements actuated, respectively, by said eccentrics and extending horizontally from the latter into and lengthwise of said work-supporting arm, and means operatively connecting said elements, respectively, to said looper-shaft to impart to the latter its rocking and sliding movements.

7. A chain-stitch feed-off-arm sewing machine having, in combination, a frame including a gooseneck, a forwardly extending arm rigid with said gooseneck, a laterally extending horizontal arm joined at one end to said forwardly extending arm, a rearwardly-extending horizontal work-supporting arm joined at one end to and substantially coplanar with said laterally extending arm and terminating at its free end below the free end of said gooseneck, an upper rotary shaft journaled horizontally in said gooseneck, a lower rotary shaft journaled in said laterally extending arm, means connecting said shafts to rotate in timed relation to one another, a reciprocatory needle mounted at the free end of said gooseneck and connected to be driven by said upper rotary shaft, a thread-carrying chain-stitch looper disposed within the free end of said work-supporting arm, means connected to said lower rotary shaft and extending substantially horizontally from said laterally extending arm into said work-supporting arm for actuating said looper, and a looperthread-controller mounted on said lower rotary shaft within said laterally extending arm.

8. A chain-stitch feed-off-arm sewing machine.

having, in combination, a frame including a gooseneck, a forwardly extending arm rigid with said gooseneck, a laterally extending horizontalarm joined at one end to said forwardly extending arm, a rearwardly extending horizontal worksupporting arm joined at one end to and substantially coplanar with said laterally extending arm and terminating at its free end below the free end of said gooseneck, an upper rotary shaft journaled` horizontally in said gooseneck, a lower rotary shaft journaled in said laterally extending arm, means connecting said shafts to rotate in timed. relation to one another, a reciprocatory needle mounted at the free end of said gooseneck and connected to be driven by said upper rotaryl shaft, a thread-carrying chain-stitch looper disposed within the free end of said work-supporting arm, means connected to said lower rotary shaft and extending substantially horizontally from said laterally extending arm into said work-supporting arm for actuating said looper, and a. looper-thread-controller mounted on said lower rotary shaft within said laterally extending arm substantially at the juncture of the latter with said forwardly extending arm.

9. The combination with a hollow horizontal work-supporting arm and a hollow horizontal forwardly disposed arm substantially coplanar with and carrying said work-supporting arm, said arms taken together having the form of an L, of a rotary driving shaft journaled in said forwardly disposed arm, a rocking and sliding looper-shaft journaled in said work-supporting arm, a'pair of eccentrics on said rotary shaft, a rock-lever within the work-supporting'arm connected to be actuated by one of said eccentrics, a crank on saidV looper-shaft operatively connected to said rocklever, a slide-rod within the work-supporting arm connected to be actuated by the other of said eccentrics, and means connecting said Aslide-rod to said looper-shaft to move the latter endwise. v

ANDREW B. CLAYTON.` 

